Oscillating hydraulic nozzle assembly



April 14, 1953 NORMAN $635,007

OSCILLATING HYDRAULIC NOZZLE ASSEMBLY Filed March 23, 1951 4 Sheets-Sheet l ERIC A. NORMAN 3nventor (Ittomegs E. A. NORMAN OSCILLATING HYDRAULIC NOZZLE ASSEMBLY April 14, 1953 4 Sheets-Sheet 2 Filed March 25, 1951 m m p. i=5

In a um ERIC, A. 0mm

Zinnentor attorney April 14, 1953 E. A. NORMAN 2,635,007

7 OSCILLATING HYDRAULIC NOZZLE ASSEMBLY Filed March 25, 1951 4 Sheets-Sheet 5 F|s 9 I I20 ERIC A. "YwRMAN Snventor 83 fl: M

(Ittornegs April 14, 1953 E. A. NORMAN 2,635,007

OSCILLATING HYDRAULIC NOZZLE ASSEMBLY Filed March 23, 1951 4 Sheets-Sheet 4.

ERIC A. NORMAN ig/i 4 (Ittornegs such as placer mining.

Patented Apr. 14, 1953 UNITED STATES PATENT OFFICE OSCILLATING HYDRAULIC NOZZLE ASSEMBLY I Eric A. Norman, Seattle, Wash. Application March 23, 1951, Serial No. 217,167

7 Claims. (Cl. 299-66) My invention relates to nozzles for hydraulic operations; and, more particularly, to an oscillate ing'hydraulic nozzle assembly in which oscillation, of the nozzle about both a vertical and a horizontal axis is automatically provided by oscillating mechanism operated by a portion of the water supplied to the nozzle, and in which adjustment of speed of oscillation may be made during operation and adjustment of size of angle of oscillation and direction of'angle of oscillation may be'made.

, My oscillating hydraulic nozzle. also termed a hydraulic monitor, is designed especially for use in hydraulic mining operations, even though it may find use in other fields such as in fire fighting. In placer mining, for gold and some other minerals, the material is not mined by digging butby the erosion action of streams of water under fairly high pressure. The hydraulic nozzle is positioned on a lower level than the top of the bank of material desired to be mined and the water is played on the vertical face ofthe bank. 7

The most speedy method of eroding the material is to play the water so as to undercut the material whereby portions of the material will break away by the force of gravity as their support is partially cut away. The water is played at the bottom of the bank, back and forth horizontally, at gradually higher levels. When the top level is reached the water stream is returned to the bottom of the bank more rapidly and the process repeated.

There has not been much development in automatic means to play a stream of water; and, normally, one or two men are employed in directing the nozzle. There has been some work done in hydraulic giants, wherein extremely high pressures are used, and. manual direction is difficult, in the form of deflectors mounted on the tip of the nozzle. These are still not automatic and require the constant attention of a worker in directing the deflector, as is shown in McAulay, U. S. Patent No. 2,086,724.

Part of the success of our industrial system is due to various means utilized to substitute automatic. machinery for apparatus requiring the constant direction of workers. It is also important to relieve laborers of the monotonous task of operating the machines. Therefore, I think it important to devise means for the automatic operation of hydraulic nozzles used in operations -The objects of my invention arei to provide automatic means for directing a hydraulic nozzle a vertical and a horizontal axis; to provide a-reversible expansiblewcontractible link between membersof a hydraulic nozzle assembly to producerelative movement therebetween; to provide means whereby said automatic means is adjustable including means for adjusting the speed of oscillation about either the vertical or horizontal axis during operation; to provide an apparatus or relatively light weight so that it may be easily moved from one location to another and yet so constructed that it remains in balance and will not tip ,over in spite of its light weight; and to provide a hydraulic nozzle assembly that operates with little attention and a small amount of maintenance, and is of relatively economical construction. I

These objects are met in my invention by providing a horizontal supply conduit with an upturned end; an intermediate conduit connected to the upturned end to oscillate about a vertical axis; and a nozzle connected to the upper end of the intermediate conduit to oscillate vertically, the nozzle either being made of metal and having a coupling making a pivotal connection between the nozzle and the conduit, or the nozzle being made of flexible material so that the oscillation vertically is by distortion of the longitudinal axis of the nozzle. In the form of construction wherein the nozzle is rigid, the vertical axis of rotation and the center of the coupling permitting rotation about a horizontal axis are on the same vertical line in all positions of the mechanism, thus providing balance of the hydraulic nozzle assembly whereby the apparatus and its support may be relatively light.

The force for oscillation is provided 'by expansible-contractible links such as hydraulic pistons and cylinders, the piston rod being connected to a first part and the cylinder being connected to a second part that moves relative the first part. The hydraulic piston assembly is provided with water under pressure by tubes leading from the mainwater conduits. Each cylinder has an asso-- ciated valve system, operated by the piston rod, to control the direction of water in the cylinder to produce reciprocating movement. Petcocks on the outlet water tubes provide means for controlling the speed of oscillation.

The detail of this construction and the method whereby the objects are met will best be understood by the following'description of a structure embodying the teachings of my invention, when read with reference to the accompanying'drawings, in which:

in section and with portions broken. away,.ofthes.

upper piston assembly shown in Figure 1 as viewed from the right foreground;

Figure 4 is an enlarged elevational view, partly in section, of the valve assemblyt'ak'en on line 4-4 of Figure 3;

Figure 5 is an enlarged view, partly. inseetion, taken on line BB of Figure 3;.

Figure 6 is a schematic View of" the new of water in the piston assembly when the piston is moving downward;

Figure 7 is a schematic. view of the. flow of:

water the piston assembly when the piston is moving upward;

. Figure 8 is an elevational fragmentary view in section and enlarged, taken on line 88 of Figure 1;

Y Figure 9 is an elevational fragmentary view, partly in section;- of aportion of the pistonassembly. similar to Figureii except. that the piston is moving upward; Figure 10 is a-perspective view, with portions broken away,- of a modified form ofmyoscillating hydraulic nozzle assembly; and

Figure ll is aside View. enlarged. and partly. in section, of a fluid outlet firoma principal conduit to a piston assembly Conduits and nozzle Referring to'Figure 1', conduit *is positioned in a substantially horizontal position and .forms a working base; It is supported by brackets 22- and the lower ends- 0f the. brackets are set. in runners 24. Runners Nhaveupturned. ends 25 so that the structure may be slid on theground to change locations or to adjust the-positiongand may be'formed from a small T-beam for sturdiness'. If the apparatus is to housed in an operation where it is'notto be moved, conduit- 20 could be fixedly positioned and it would not have to be a horizontal position. A

. A source of. water supply, under. pressure is connected. to? water supply conduit. 20-, by suitablemeans, at 28; Conduit 2-!) reduces in. diameter. as it extends away from the water inlet at 2-8. This increases the pressure of. the water as it passes through the conduit. Conduit 20- bends upward near its: outlet to form avertical portion (illwhich carries an annular flange 32 at its upper end.

Intermediate conduit 34- is positioned above flange 32 in a substantially vertical position. lhe passageway in intermediate conduit 34 deviates slightly to one side just above its lower end,continues: upward, and makes a right angle turn in the opposite direction at its top so that the face of its outlet is in an upright plane. An annular flange 35 is positioned at the lower end.

To'permlt rotaton of the intermediate conduit 34 in respect to conduit 20-, there is provided a connecting element.

The-connecting element has an annular. member 38 having a cross section inthe form of a rectangle with a half round groove extending around its periphery, and is attached to annularfiange 32 by a plurality of tap bolts 42. A second annular ring 40 having a rectangular annular groove around its periphery is similarly attached to flange 33 by a second series of tap bolts 62. For sealing annular members 38 and 40 in a superposition there are provided C shaped clamping members 4! which have a half round groove extending around the lower inner surfaces and a plurality of inwardly extending fingers 43 protruding, from the upper half. of their-inner suriaces. These. fingers 43 extend into the rectangular groove in ring 46 while roller balls as are carried in the half round groove and extend into the opposed half round groove in ring 38 looking the two rings and their attached parts together in a frictionless manner. The C shaped clamping members il are held together by means of. bolts 4? extending through the outwardly extending cars :53 When bolts 43 are loosened, rotation of intermediate waterway 34 is permitted within members ii while conduit 29 remains stationary.

I The water dischargeconduit nozzlest' is connected to intermediateconduit3 andhas a passageway that vmakes a right angle turn just beyond. the joinder of the nozzle and the conduit, and returns gradually in the opposite direction as it extends: forward. so that the nozzle tip 48 is substantially centered above the vertical portion to: of conduit 2t in rear'elevation, as shown in Figure. 8. Theicenter ofthe waterpassageways.

in the conduits and nozzle are shown schematically in Figure 2.

Nozzle 46 reduces; in diameter as it approaches. the tip 48 and the intermediate conduit M similarlyi narrowsslightly, serving to. increase the pressure of the water. Nozzle tip E8 is'pr'eferably separable from nozzle 46 so that different size and form of opening, may be provided or a. device with aplurality of nozzle tips. might. be positioned in' place of tip 43 to provide means for changing. tips during. operation; such as is shown in Eastwood, U18. Patent No. 609,578. A flexible elementmay be fixed'to the end of nozzle tip 48 to. facilitate. the horizontal oscillation. of nozzle 86', the end of such a flexible element always. lagging the movement of nozzle :16 due to inertia and the reaction due to the water: passing through that element acting in the opposite'direction of the extension of said flexible element tending to push thev nozzle 58 in the. direction nozzle 45 is moving...

The upper end of intermediate conduit 34' is of a size permitting positioning inside the connectingend of nozzle 46.

The end of". the conduit. fits against an internal annular projection 58 ofthe nozzle and the end of the. nozzle fits against an external annular flange 52 of the conduit. Ball bearings 54 are positioned between the nozzle and the intermediate conduit to facilitate movement of one in relation to the other; and annular sealing rings positioned between the two members provide a watertight seal. It should be noted that; various other means might be provided to flexibly couple the conduits and the intermediate conduit and the nozzle. The use of ball bearings in the connecting devices is desirable to provide ease of rotation.

Referring to Figures 1, 2 and 8, the approximate center of the connection between intermediate conduit 34 and nozzle 46 is on the axis of rotation between conduit 20 and intermedi ate conduit 34. This is important for maintaining the apparatus in balance. The movement of water through these parts has relatively little tendency to biasthe top portion no matter how the nozzle and intermediate conduit'are turned.

'In' some operations-it may be desired to employ a hydraulic monitor that sweeps only horizontally or one that sweeps only vertically. The depicted structure could be modified by fixedly joining Oscillating mechanism The mechanism for producing rotation of intermediate conduit 34 about a vertical axis is indicated generally at 56 and the mechanism for producing rotation of nozzle 46 about a horizontal axis is indicated generally at 58. As indicated by the arrows at nozzle tip-48 in Figuresl and 2, the

nozzle tip may be moved both horizontally and vertically relative the conduit 28.

' The mechanism at 56 includes a piston cylinder .58 pivotally attached at 68 to bracket 62 extend-' ing from conduit 28. Piston rod 64 has fitting 65.

secured onits outer end. Fitting 65 is pivotally connected to arm 66. The upper end 61 of arm 66-forms a horizontal circular surface having uD-' which is determined by controls to be described later. The direction of that angle can be changed by adjusting the toothed engagement of arm 66 and bracket 68. Referring to Figure. 1, a clock-- wisexturning of end 'II of bracket 68 relative arm '66, asviewed from above, will result in nozzle 46 oscillating horizontally further to the right. The "mechanism at 56 'is supplied with fluid under pressure by the tube I8 leading from conduit 28, tube I8 having control means such as petw cock 12 for adjusting the flow of water.

Tube 18 must be somewhat flexible or provided with pivoting means to permit sideways movement ofthe structure at 56.

- The mechanism at 58 is similar. Piston cylinder I4 ispivotally secured to-bracket I5 extending.

from intermediate conduit 34. Piston rod I6 is pivotally connected to arm I8 which makes toothed, adjustable engagement with bracket 88 secured to the inner end of nozzle 46. 'Ihemech-i anism at 58 is supplied with water under-pressur by tube 82 having petcock 84 for adjustin the flow of water, tube 92 leading from intermediate conduit 34. Reciprocating movement of piston rod I6 will cause nozzle tip 48 to oscillate vertically. The angle of oscillation may be shifted vertically by adjustment of the toothed engagement of arm 18 and bracket 88.

The structure shown in Figures 3, 4, 5, 6, 7 and.

9 corresponds to the mechanism at 58 but is typical of the mechanism at 56 and the piston assembly shown in Figure 10. Piston cylinder I4 is open at the top and -closed by suitable means at the bottom. Piston 86 is positioned to slide in said cylinder, having suitabl structure to prevent passage of water from one side to the other as by having two plates with a flexible sealing member 88 between. Piston 86 is secured to they end of piston rod I6 by suitable'means such as a cap screw. Valve housing 98 has a cylindrical bore 0n one side of a size to fit over the open end of piston cylinder 14. Housing 98 has an opening in which piston rod 16 is positioned to slide, there being suitable sealing means at 92 to p v passage of water.

Valve housing 98 has a cylindrical valve chamber 94 with open ends at one side of piston cylinder ",the longitudinal axes of the chamber and cylinder being parallel. Cylindrical valve 96 s positioned to slide in chamber 94 and there are sealing rings 91 near the top and bottom of said chamber. Passageway 98 leads from water supply tube 82 to valve chamber 94 and then to the upper end of piston cylinder I4. Valve 96 blocks the passage of water through the valve chamber except when a portion having an annular roove I88 is positioned opposite passageway 98.

When groove I88 is so positioned the water from intermediate conduit 34 is free to p ss into the piston cylinder and force the piston 86 downward as shown in Figure 6.

Upper exhaust passageway I82 leads from the upper side of piston 86 to valve chamber 94 and then, at right angles, to exhaust petcock I84. When piston 86 is moving upward, groove I88 is positioned opposite passageway I 82 and the water from above piston 86 is free to pass out petcock I84, as shown in Figure 7. Petcock I84 may connect with a receptacle or the Water may exhaust upon the ground.

Supply passageway I86 extends from passageway 98, near the connection of water Supply tube 82, toward the base of housing 98; and connects with horizontal passageway I81 which passes through valve chamber 94; and, making a right angle turn to th side, connects with tube I88 running to the base of piston cylinder 14. When piston 86 has reached its lowest position, valve 96 has descended until an annular groove H8 is in line with passageway I8! and water is free to flow from tube 82, through passageways I 86 and I81 to tube I 88 and thence under the piston 86 to move the piston upward as is shown in Figures '7 and 9. Plug II2, threaded into valve housing 98, joins passageway I81 at its juncture with passageway I 86. This provides an opening for cleaning passageway I 81 and it is noted that water supply tube 82 could join the housing 98 at this point instead of joiningpassageway 98 or Separate supply tubes could be used and passageway I86 eliminated.

Exhaust passageway II4 joins passageway I8! between valve chamber 94 and tube I88; extends upward; turns at right angles to join valve chamber 31; and, making a right angle turn to the side connects with exhaust control means such as p cock II'6. Petcock I 84 may connect with a receptacle or the water may exhaust upon the ground. As piston 86 moves downward, water underneath passes into tube I88: into passageway I81; cannot pass through the valve chamber 94 at this point because annular groove H8 is now in line with passageway II4; passes upward to passageway I I 4; past the valve chamber 94 by means of angular groove H8; and reaches exhaust petcock H6, as can be seen from Figures 3, 4 and 6.

Control of the amount of water passing into and out of piston cylinder 14 is obtained by varying the opening of petcocks I84 and I I6, and thus the speed of movement of piston rod I6 is con-.

trolled resulting in a variable speed of oscillation of the nozzle 46. The speed of both up and down movement of piston rod 16 is varied by.

7 adjustmentof petcock 84; the speed of: downward: movement. of piston 85 may. be decreased by. partially closing. petcock. H5; and the speed of upward movement of piston 86. may be decreased by partially closing petcock IM-i.

Valve 96. has an axial passageway in whichisv slidably positioned control rod II8. Control rod II8 extends below the valve. housing-$3 and stop I220 is secured near the end, of the rod. Compression. spring I22 is positioned between stop IZIla-nd the lower'end of valveQd. I23 is secured to control'rod II8. above valve. 95 and compression spring I24 ispositionedbetween stop I 23 and the/upper. end of valve 96. Near the center of valve 96 isapair of V-shaped annular grooves. I26. Ball d'etent I28 ispositioned in the valve. housing in the path of said V-shaped' grooves I 25; Detent I28. is urged by a spring I30, the pressure of which may be varied by movement of plug I32;

As control rod I I8 moves downward, stop I23 presses against compression spring I24 and spring I24 bearing on valve 96 tends to .force the valve down. Atthe start of the downward movement of rod II8. detent I28 is engaged in the lower V-shaped groove I26'an-d valve 96 does not move downward until the force of spring I24- is greater than the force of spring I30 at which point valve 96 moves downward until detent I28 engages in the upper V-sh-aped groove I25. Similarly onthe upward movement of rod I I8; valve 96 remains in its lower position until the force of compression spring I22 is greater than the force of spring I30.

Control rod II8 is actuated by a lateral arm I34 fixedly attached to piston rod I6 and slidably mounted on rod IItl between two stops I36 and I38 fixed to control rod II8.

As piston rodrlli must/travel from a downposition the distance between stops I35 and I38 before the control rod I I8 is moved and control rod II8 must move upward some distance before the force of compression spring I22 overcomes the force, of spring I36 behind ball detent I28, the water is almost exhausted from the upper side ofpiston 85 before the exhaust passageway N32 is blocked by the movement upward of valve and annular groove I is in position so that water may enter through passageway 98 to the upper side of piston 86 to move it downward. Therefore the piston rod I makes almost a maximum stroke and nozzlefi movesa maximum distance up and down. If it is desired that nozzle 45 move a smaller; distance up and down then stops" I'36- and, I38 may be moved closer together and valve, 53 will cut: off the supply and exhaust of water before the maximum stroke is finished as compression springs I22 and I24 are compressedmore quickly. Moving stops I23 and I23 closer to valve 96 would serve the same purpose.

' The valve assembly may be characterized by the phrase a full-stroke valve gear having a lost motion connection with a piston rod, valve 95 changing positions on every stroke of piston rod 56 but the connection between valve 95 and piston rod I6 being of a lost-motion type wherein valve 96 does not change positions until near the end of the stroke of piston rod It The valve gear is double acting, changing directions as the piston changes directions.

Other means of valve control could be substituted for the embodiment depicted. Lateral arm I34 could be fixedly attached to control rod II8 and stops I35 and I33 be eliminated; the same action being obtained by wider spacing of Similarly stop stops I20 and I23 from valve 96.. Another mom-'- fication would, be to have valvev 96 fixedly positioned on control rod 9:, stops I23, I20, eliminated, and compression springs; I24, I22 mounted between stops I38 and I36 on either sideof; lateralarm I34. Other forms of valving means could, be substituted, as will be apparent to those skilled in theart such as'arotary va-lving assembly. It is'desirable in any form thatcontrol means-such as: petcocks I04, I05, 84 be provided for control of the speed of the piston during operation.

It can be seen that I have provided an oscillating nozzle assembly that is not only completely automatic. but also is' adjustable: asrto. the direction of; the, an le of oscillation, bythe relative positioning of arms I3 and 66 and brackets 80, and 68; as to; the speed of, oscillation, by; the use of petcccks. I2, 84, I04, I I6-,. etc; andas to the angle of oscillation, by movement; of stops I36, I33, I3'I and I319.

Even though I have only depicted and described an embodiment of my invention in which-the oscillating movement is produced by a hydraulic piston;mechanism,,,it should bev noted that other devices could be employed to produce a similar action such as a structure powered by a water wheel. A term to describe the devices contemplated in my invention would be a reversible-- expansible-contractible link which is descriptive of my hydraulic piston mechanism. and other similarly operating mechanisms.

Flexible nozzle A modified form of construction is shown in Figure 10. Conduuit 20 and the mechanism for producing rotation about a vertical axis indicated at 56, including the piston rod 64, arm 66 and bracket 68, are similar to the construction shown in Figure 1. Intermediate conduit I40 is formed with a bend approximately 90 degrees. Nozzle I42 is made of flexible material, preferably rub-- her, and is'fixedly secured to the upper end of conduit I40 by ring I44.

Mechanism is provided for oscillation of nozzle I42 about a horizontal axis similar to the mechanism at 58 in Figure 1. The piston assembly I46 is pivotally connected at I50 to bracket I48 extending from intermediate conduit Mil. Piston rod I52'is connected to the outer end of nozzle I42 by a pin in fork I55 extending from clamp I56. Clamp I56 secures the outer end of nozzle I42 and nozzle tip I58, there being means to adjust clamp I 56 as: by boltI Bil. Lever I52. is: formed as part of clamp I58 and extends backwardv to provide means for manual operation. of nozzle I42 if that bedesired at any time. Nozzle tip I58 has a valve at I64 with a handle I66 for shut-off purposes.

The use of the flexible nozzle I42 involves less expense than the construction shown in Figure 1 and yet provides the same vertical and oscillating movement.

In Figure 11 is shown a fluid outlet assembly for passage of water from, intermediate, conduit I45 to piston assembly I45. Outlet member III) is threaded into discharge opening I12. Petcock Ild is positioned in outlet member I10. Filter I connects outlet member Ilfl and tube I78 to trap sediment which might clog valve passageways. Baffle I33 collects water and directs it into discharge opening H2.

I have shown an oscillating hydraulic nozzle assembly that is thoroughly automatic and is capableof varied adjustment. including" adjust,- ment of speed of. oscillation; duringv operation.

9 This is a highly efficient mechanism, requiring little maintenance and'of economical construction. A group of hydraulic nozzles may be easily managed by one worker, where in the past it was necessary to have one or more menin-constant operation of each nozzle.

fIhflVB described various specific embodiments of; my invention but it will occur to those trained in the art that various modifications may be made to the apparatus shown without departing from my invention. What I claim is new and patentable is;

1. An oscillating hydraulic nozzle assembly for directing water. supplied under pressure, comprising: a Water'supply conduit having a main portion in asubstantially horizontal position and an upturned vertical portion; an intermediate conduit having a water inlet opening in its lower surface, said water inlet opening of said'intermediate conduit being connected to the upper end of said vertical portion of said supply'conduit in a manner permitting rotation of said intermediate conduit about a vertical axis; said intermediate conduit having an upper water. outlet opening in its side; a nozzle having awater inlet opening nearone end in its side, said. water inlet opening of said nozzle being connected with said water outlet opening of said intermediate conduit in'a manner permitting rotation of the nozzle about a horizontal axis; the connection of said nozzle and said intermediate conduit being d-irectlyabove the connection between said intermediate conduit and said supply conduit; the water passageway in said supply conduit, intermediate conduit and nozzle becoming smaller as it approaches the free end of said nozzle; hydraulic piston and cylinder means, powered by water passing through said assembly, connected to said supply conduit and said intermediate conduit for producing an oscillating movement of said intermediate conduit about a vertical axis, hydraulic piston and cylinder means, powered by water passing through said assembly, connected to said intermediate conduit and said nozzle for producing an oscillating movement of said nozzle about a horizontal axis; means for ad ustably controlling, during operation, the now or water through said hydraulic piston and cylinder means for determining the speed of oscillation; and the connection between said hydraulic piston and cylinder means and said supply conduit, intermediate conduit, and nozzle being ad ustable so that the angle of oscillation of said nozzle vertically and horizontally may be changed in direction vertically up and down and horizontally to one side or the other.

2. Oscillating hydraulic nozzle assembly for directing water supplied under pressure, comprising: a water supply conduit having a vertical outlet portion; an intermediate conduit having a lower water inlet opening, said water inlet opening of said intermediate conduit being connected to said vertical outlet portion of said supply conduit in a manner permitting rotation of said intermediate conduit with relation to said supply conduit about a vertical axis; said intermediate conduit having an upper water outlet opening; a flexible nozzle having a water inlet opening near one end, said water inlet opening of said nozzle being fixedly connected to said upper water outlet of said intermediate conduit; hydraulic piston and cylinder means, powered by water passing through said assembly, con- 10 nected'tosaid supply conduit and saidintermediate conduit for producing an oscillating move ment of said intermediate conduit about a vertical axis; and hydraulic piston and cylinder means, powered by water passing through said assembly, connected to said intermediate conduit and said nozzle near its free end for producing an oscillating movement of the free end of said nozzle vertically. 1

3; An oscillating hydraulic nozzle assembly for directing water supplied under pressure, comprising: a water supply conduit having a vertical outlet portion; an intermediate conduit-having a water inlet opening in its lower surface, said water inlet opening of said intermediate conduit being connected to said vertical outlet portion of said supply conduit in a manner permitting rotation of said intermediate conduit with relae tion to said supply conduit about a vertical axis; saidintermediate conduit having an upper water outlet opening; a nozzle having 7 a water inlet opening near one end, said water inlet opening of said nozzle being connected to said upper water outlet of said intermediate conduit, the free end of said nozzle being capable of vertical movement independent of said intermediate conduit; hydraulic piston and cylindermeans; powered by water passing through said assembly, connected to said supply conduit and said intermediate conduit for producing an oscillating movement of said intermediate conduit about a vertical axis; and hydraulic piston-and cy'l inder means, powered by water passing through said assembly, connected to said intermediate conduit and said nozzle for producing an oscillating movement of the free end of said nozzle vertically.

4. An oscillating hydraulic nozzle assembly for directing water supplied under pressure, comprising: a water supply conduit having a water outlet opening in its upper surface; an intermediate conduit having a water inlet opening in its lower surface, said water inlet opening of said intermediate conduit being connected to said water outlet opening of said supply conduit in a manner permitting rotation of the intermediate conduit with relation to the supply conduit about a vertical axis; said intermediate conduit having a water outlet opening in its side; a nozzle having a water inlet opening in its side, said water inlet opening of said nozzle being connected with said water outlet opening of said intermediate conduit in a manner permitting rotation of the nozzle with relation to the intermediate conduit about a horizontal axis; the connection of said nozzle and said intermediate conduit being directly above the connection between said intermediate conduit and said supply conduit; hydraulic piston and cylinder means, powered by water passing through said assembly, connected to said supply conduit and said intermediate conduit for producing an oscillating movement of said intermediate conduit about a vertical axis; and hydraulic piston and cylmdermeans, powered by water passing through said assembly, connected to said intermediate conduit and said nozzle for producing an oscillating movement of said nozzle about a horizontal axis.

5. An hydraulic monitor, comprising: a water supply conduit to lie on a supporting surface and form a working base, a water discharge nozzle flexibly coupled to said conduit and movable with relation thereto about an upright axis, and a re-- versible expansible-contractible link disposed between said conduit and said nozzle off-center of the latter for flexing said coupling to cause said nozzle to travel through an arcuate sweeping path over the earth relative said conduit, said link including a cylinder having a reciprocating piston therein, a piston rod connected with said piston and extending through an end of the cylinder, a full-stroke slide valve gear foradmitting fluid under pressure to one side and then the other of said piston and for accommodating discharging fluid from said chamber, and an arm carried by said rod and having a lost motion connection with said slide valve gear to carry it to its extreme positions at each of which the direction of travel of the piston is reversed and the direction of travel of the nozzle likewisev reverses. 6. The structure according to claimin which there also is a flexible connectionbetween said conduit and said discharge nozzle arranged to permit the nozzle tobe raised and lowered in upright paths about a horizontal axis, and a second similar expansible-contractible link associated with the parts of said second flexible connection to produce flexing of said second connection.

'7. An hydraulic monitor, comprising: an elong'a'ted water supply conduit to lie on a supportmg surface and including an upwardly directed portion, an intermediate upright conduit superposed over said upwardly directed portion and coupled thereto in a rotatable water-tight manner that permits rotation of the intermediate conduit about a verticalaxis, a discharge conduit communicably associated with said upright convarious angular relations to the general elongation of the water supply conduit, a reversibly expansible-contractible hydraulically operated link connected between said water supply conduit and said intermediate upright-conduit in sucha manner that expansion or contraction of said link produces rotation of the intermediate conduit relative said water supply conduit; a second reversibly expansible-contractiblehydraulically operated link connected between said discharge conduit and said intermediate conduit in such a manner that expansion or contraction of the link roduces various inclinations of "said discharge conduit relative the earth and double-action valving'me'a'ns operable automaticallyto reverse the action of. expansion or'ccntr'acti'on of the link upon thelink arriving at apredeterminedlerigth.

ERIC "NORMAN.

ReferencesGited in the flleof this patent UNITED STATES FOREIGN PATENTS Number Country Date Germany la dfill..- May 4, 1926 

